遗传 ›› 2023, Vol. 45 ›› Issue (10): 887-903.doi: 10.16288/j.yczz.23-059

• 综述 • 上一篇    下一篇

噬菌体Z基因组生物合成通路的研究进展

陈荟玉(), 赵素文()   

  1. 上海科技大学iHuman研究所与生命科学与技术学院,上海 201210
  • 收稿日期:2023-05-26 修回日期:2023-08-17 出版日期:2023-10-20 发布日期:2023-08-18
  • 通讯作者: 赵素文 E-mail:chenhy6@shanghaitech.edu.cn;zhaosw@shanghaitech.edu.cn
  • 作者简介:陈荟玉,在读硕士研究生,专业方向:计算化学与生物学。E-mail: chenhy6@shanghaitech.edu.cn
  • 基金资助:
    国家自然科学基金项目(32122024);上海市生物大分子与精准医药前沿科学研究基地资助

Progress on Z genome biosynthetic pathway of bacteriophage

Huiyu Chen(), Suwen Zhao()   

  1. iHuman Institute and School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
  • Received:2023-05-26 Revised:2023-08-17 Published:2023-10-20 Online:2023-08-18
  • Contact: Suwen Zhao E-mail:chenhy6@shanghaitech.edu.cn;zhaosw@shanghaitech.edu.cn
  • Supported by:
    National Natural Science Foundation of China(32122024);Shanghai Frontiers Science Center for Bomacromolecules and Precision Medicine

摘要:

噬菌体基因组中存在丰富的碱基修饰,主要用于逃避宿主内切酶的切割。40多年前,在蓝藻噬菌体S-2L的DNA中,研究者发现2-氨基腺嘌呤(Z)完全取代腺嘌呤(A),与胸腺嘧啶(T)形成具有三根氢键的互补配对,形成了特殊的Z基因组。近年来,研究者在多个噬菌体中发现并证实了噬菌体Z基因组生物合成通路。该通路是一个多酶系统,其中包含由噬菌体DNA编码的2-氨基脱氧腺苷琥珀酸合成酶(PurZ)、脱氧腺苷三磷酸水解酶(dATPase/DatZ)、脱氧腺苷/脱氧鸟苷三磷酸的焦磷酸水解酶(DUF550/MazZ)和DNA聚合酶(DpoZ)。本文在简述噬菌体中各种修饰核苷发现历史的基础上,详细介绍了Z基因组生物合成通路中多种酶的研究进展,最后对Z基因组及其合成通路中多种酶的应用进行了展望,以期为该领域的研究提供借鉴和参考。

关键词: Z基因组, 噬菌体, DNA修饰, 2-氨基腺嘌呤, 生物合成通路

Abstract:

There are abundant base modifications in bacteriophages’ genomes, mainly for avoiding the digestion of host endonucleases. More than 40 years ago, researchers discovered that 2-amino-adenine (Z) completely replaced adenine (A) and forms a complementary pairing with three hydrogen bonds with thymine (T) in the DNA of cyanophage S-2L, forming a distinct “Z-genome”. In recent years, researchers have discovered and validated the biosynthetic pathway of Z-genome in various bacteriophages, constituting a multi-enzyme system. This system includes the phage-encoded enzymes deoxy-2′-aminoadenylosuccinate synthetase (PurZ), deoxyadenosine triphosphate hydrolase (dATPase/DatZ), deoxyadenosine/deoxyguanosine triphosphate pyrophosphatase (DUF550/MazZ) and DNA polymerase (DpoZ). In this review, we provide a concise overview of the historical discovery on diversely modified nucleosides in bacteriophages, then we comprehensively summarize the research progress on multiple enzymes involved in the Z-genome biosynthetic pathway. Finally, the potential applications of the Z-genome and the enzymes in its biosynthetic pathway are discussed in order to provide reference for research in this field.

Key words: Z-genome, bacteriophage, DNA modification, 2-aminoadenine, biosynthetic pathway